Thanks for replying Taede.
I got 2 leads with my unit one where the power cables fit into and another one that I'm not sure any other wires fit into as I have not tried it. My original unit is a DX sat nav unit from a Skoda Superb MK1 Elegance.
I bought the unit because it was supposed to be plug and play. I'm not very good with auto electrics so I don't know which wires need to go where or as you said minor adjustments needed.
I just wanted to bring my in car technology up to date and also have a few safety features (Dash cam, tyre pressure monitor system and reversing camera, OBD2) and DAB Radio for my good lady.
This is the unit I bought, wires that came with the unit and back of the unit.
I am very grateful to you guys for helping me. Thank you very much.